The blue circle is slightly heavier than the red circle, abt 2 to 3 grams. The weight consistency of a red circle varies near 3 grams from high to low. Comparing the red and blue could be as much as 5 grams. Not a lot but enough to notice a little difference in c/b reaction.

The blue circle is slightly heavier than the red circle, abt 2 to 3 grams. The weight consistency of a red circle varies near 3 grams from high to low. Comparing the red and blue could be as much as 5 grams. Not a lot but enough to notice a little difference in c/b reaction. <hr /></blockquote>

Just to add, the Super Pro Aramith set used to come with a Red Triangle Cueball. This cueball weighs the same as the Centennial's Blue Circle (spec.-wise), which is supposed to weight the same as the object balls. The Red Circle is supposed to weigh a little less. That's what Saluc confirmed to me.

I think today's Super Pro Aramith set comes with a cueball with a red Aramith logo on it. Maybe it's just the TV set of Super Pros. They are sold individually as well (thank Paul Mon). I've also seen somewhere a picture of a set of balls (Aramith Premiers) with a cueball having a blue Aramith logo on it.